Locomotive



G. M. EATON.

LOCOMOTIVE.

APPLICATION FILE) JAN. I6. i917.

Patented July 27, 1920.

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INVENTOR ear M [a fon ATTORNEY G. M. EATON.

LOCOMOTIVE.

APPLICATION FILED IAN. I6. 19u.

vPafnted July 27, 1920.

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)1m32/m@ l ATTORNEY l UNITED STATES PATENT OFFICE.

GEORGE M. EATON, 0F PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO WESTINGHOUSEELECTRIC AN'D MANUFACTURING-COMPANY, A CORPORATION OF PENNSYLVANIA.

LocoMoTIvn.

Specification of Lettersvlatent.

Patented July 2v, `1920.

Application led January 16, 1917. Serial No. 142,634.

To all 'whom t may concern:

vBe it known that l, GEORGE M. EATON, a citizen of the United States,and a resident of Pittsburgh, in the county of Allegheny and State ofPennsylvania, have invented a new and useful Improvement in Locomotives,of which the following isa specification.'

My invention relates to locomotives and particularly to means forjoining thel trucks to thecabs thereof. t

One object` of my invention is to provide a locomotive having a truckandl a cabwith means which shall cushion all longitudinal forces thatact between the truck and the cab and maintain a force which tends tohold the .truck parallel'to the cab. Another object of my inventionis'to provide a locomotive` of the above-indicated character which shallhavethe trucks thereof pivot-ally joined to the cab and cushion thetrucks relative to the cab in a longitudinal direction. f

More specifically, my invention embodies a locomotive provided withfriction-draft gears which shall resiliently connect the trucks to thecabA and exert a force ,to maintain the trucks parallel to the cab andthus prevent nosing of the trucks.

At the present time, trouble is experienced with electric locomotives inbreaking an eX- cessive number of the center pins which join the trucksto the cab. The inertiaof the cab, when the locomotive vbumps a train orwhen lheavy surges'f occur when running, causes the cab to strike the`center pinsa solid lblow which, in many cases, breaks one of the same.As the tendency in locomotive construction is to build larger cabs thanthe ones nowk in service, it is necessary to p rovide some means forrelieving the various center pins'of the sudden blows which they aresubjected to by reason of thel inertia of the cab.

According to my invention, friction-draft gears are provided `forjoiningthe trucks to the cabk to cushion the center pins against alllongitudinal forces acting between the trucks and the cab. Y

In the accompanying drawings, Figure 1 is a partialsidey elevationalview of a locomotive constructed in accordance with my invention; Fig. 2is a sectional end view of the locomotive illustrated in Fig. 1; Fig. 3

is a sectional view of a standard frictiondraft gear; Fig. 4 is a'partial side elevational view of a locomotive embod ing a modificationof my invention; and igs. 5 and 6 are sectional views of the locomotiveillustrated in Fig. 4.

Referring to Figs. 1, 2 and 3 of the drawings, a locomotive 1 embodies acab or vehicle body 2 and a truck 3. The truck 3 is provided with side`frames 4 which are mounted on the driving wheels 5 and withfriction-draft gears 6 and 7 which are supported on the side frames 4 bymeans of the pedestal jaws 8 and 9. l V- The cab 2 is supported on theside frames 4 by Vmeans of friction bearings 10 and is provided with across beam 11 having projections or jaws 12 and 13 extending downwardlytherefrom. The projections or jaws 12 and 13 of the cross beam 11 aredisposed adjacent or opposed to the pedestal jaws 8 and 9, asillustrated in Fig. 3 of the drawings, and in a position to engage thefollower plates 14 and 15 of the friction-draft gears 6 and 7.

Referring to Fig- 3- of the drawings, each friction-draft gearl embodiesa cylindrical body portion 16 which isopen at one end andvis providedwith grooves which are ladapted to receive friction strips 18 andsegmental carriers119. A preliminary spring 20 and an auxiliarypreliminary spring 21 the shape `of a frustum of an octagonalpyramid andis in contact with the segmental carriers V19.V A release springl 23andan auxiliary release spring. 24 are disposed between the segmentalcarriers 19 and the closed end portion of the body portion 16. A

The above friction-draft gear is the wellknown Westinghousefriction-draft gear which is adapted to cushion the forces acting in alongitudinal direction thereof and dissipate the same by friction. Thus,if we consider the pedestal jaws V8 in Fig. 3 to remain stationary andthefprojections ,12

i and 13 to be suddenly moved relative thereto so that the projections,12 engage the follower plate 14.7the blow is first cushioned by means0f the preliminary spring-20 and the auxiliary preliminary springl21.Then, the segmental carriers 19 and the friction strips 18 frictionallyengage the body portion 16 and are moved forward with the wedge 22 untilthe frictionbetween the cylinder 16 and the partsY 18 and 19 isequivalent to a force invention andany other wellknown fric? tion-draftsired. V

From the above description of the fricgear mayv be utilized, ifsodeltion-draft gear, it is believed that the function of the same inconnecting the truck 3 Vto 'the cab 2 will be readily perceived. Thus,in case the truck 3 issuddenly movedto the left relative to the 'cab2the pedestal jaws 3 and 9'engage the follower plates 14 ofthe forfrictionally and resiliently connectingv portio'nsof the .cross beam 34arejconstru'cted friction-draft gears 6 and 7 whicl'r'cushion the blowdelivered by the truck 3 before the same is transmittedV to theprojections13 from the cab 2. VIn case the truck is moved in theopposite direction, the friction-draft gears6 and 7 will again performalike functionand cushion the blow from the truck 3 before .the Vsame isdelivered to the projectionsv13 from the cab 2.

Sufficient clearance'-v should be provided between'y the projections 12and 13 of the cross beam 11 and the pedestal jaws 8 and 9 in order that4the locomotive may safely' negotiate any curve in the track which itmay encounter. If desired', friction shoes (not shown) may be installedin all contactmaking surfaces between and 13 and the pedestal jawsV 8and 9. j Referring Ato Figsl 4, 5 and 6 of the draw# ings, Aa locomotive25 embodies Va cab 26 and a truck27 whichis pivotally and resilientlyconnected to the cab l26. The truck 27 em' bodies side frames 28 whichVare mounted on driving wheels 29 anda truck ,bolsterY which is adaptedto support acenter pin 31 andy friction'bearings 32. The cab 26is'prothe Vcross beam tothe frame 33 of the cab.

The friction-draft gears 35 and'36 which Y are illustrated Figs. 4, 5andG are similar to the friction-draft gears illustrated in F ig. 3, andcorresponding reference characters are used in describingthe same.The'end for Vsupporting the friction-'draft gears 35 and 36, .asillustrated inFig; 6, so that the follower plates 14 andfl may engagethe cab frame 33 .whenever the truck 27 and the cross beam 34 are moved'relative to the cab 26. Thus, in case the truck 27 isrmoved suddenlytoward the right, asl illustrated in ,65 Fig. 44 of the drawings, thecross beam 34,

the projections which is directly connected to the truck 27 i by meansof the center pin 31, will force the follower' plates'l of thefriction-draft gears gears 35 .and 36. Thus, it is perceived that thecenter pin 31 is insured against all blows which maybe lcaused by reasonof the inertia of the cab.

In case the wheel-base arrangement and the curves in the track to betraversed require compression of the draft gear springs beyond'the limitof the springs in a standard friction-draft gear, it may be necessary toinstall special springs having a Vgreater travel before the frictionsurfaces engage. Special springs may also be necessary to providecomparatively free swing ofthe truck withinthe necessary operativelimits and to avoid excessive frictional restraint when the locomotiveis running on a curved track.'

.Various modifications in the structure herein lset forth maybe madewithinV the spirit andscope of my invention, and I de! sire that onlysuch limitations shall be im; posed as are indicated by the appendedclaims. i' f Y I'claim as my invention:

' 1. In a vehicle, Vthe, combination, Y with a longitudinal Vmovementsofthe truck and body to reduce'the breaking strains on said fixed pin,said means alsotending to maintain said truck and body parallel to oneariother.

2.In Va vehicle, the combination with. aV

truck, ofv a vehicle body mounted thereon, independent pairs of opposedjaws on oppo site sides of the longitudinal centerline` of jsaidvehicle, `and resilientfmeans ,in the yspaces V between said ljaws forcushioning relative longitudinal body and truck Y Y In. a vehicle,thelcombination with aV truck, of a vehicle Abody mounted there0n,fafixed v center pin Ypivotally connecting said truck andbody,,independent pairs of opposed jaws Vonopposite sides` of thelongitudinal center line of sald'vehic'le, and resili-` ent means inthespaces lbetween said'jaws for Vcushioning vrelativelongitudinalimovegments of said body andtrucktoreduce the breaking strains oni-,saidfiXedenter pin', said means also tendingto maintainA` saidV body andtruck parallel toone another.

' 4. In a vehicle, the Vcombination with a truck and aV cab, of'frictionffdraft gearsdisposedlbetweenthe cab andthe truck forcushioning longitudinal forcesfracting between the cab and the truckand,V for tending Y to the cab.

5. In a vehicle, the combination with a truck and a vehicle body, of afriction-draft gear, and projecting jaws respectively mounted on saidtruck and said body for engaging the `friction-draft gear to effect aresilient connection between the body and the truck.

6. In a vehicle, the combination with a truck and a cab, of means forresiliently and frictionally joining the truck to the cab to cushionlongitudinal forces acting between the cab and the truck.

7. In a vehicle, the combinaiton with a truck, of a vehicle body mountedthereon, a beam carried by, and extending transversely of, one of saidmembers, pairs of jaws on said beam, pairs of jaws on the other memberopposed to the jaws on the beam, and resilient means in the spacesbetween said jaws for cushioning relative longitudinal movements of saidbody and truck.

8. In a vehicle, the combination with a cab and a truck, of a cross beampivotally connected to the truck, and friction-draft gears mounted onthe cross beam for connecting the latter to the cab.

9. In a vehicle, the combination with a truck and a vehicle body, of across beam pivotally connected to the truck, and friction-draft gearsfor connectlng said cross Vbeam to the vehicle body.

10. In a vehicle, the combination with a truck and a vehicle body, of across beam pivotally connected to the truck and resiliently connected tothe vehicle body.

11. In a vehicle, the combinatlon with a truck .and a cab, of a crossbeam pivotall connected to the truck, and friction-tirait gears forresiliently joining the cross beam to the cab.

In testimony whereof, I have hereunto subscribed my name this th day ofDec.

GEORGE M. EATON,

